II/50 Photometric Standard Stars (Cousins 1971)
Photometric Standard Stars: bright Southern stars and stars in equatorial zone
Cousins A.W.J.
<Royal Observ. Ann. 7 (1971)>
=1971ROAn....7....1C 1971ROAn....7....1C
ADC_Keywords: Colors; Photometry, UBV; Stars, standard
Description:
The non-variable stars brighter than 5.0 mag in the equatorial zone
between declinations +10° and -10° were adopted by IAU
Commission 25 in 1970 as primary standards for the Johnson and Morgan
UBV system of 1966. Fainter HR stars in the same zone were chosen as
secondary standards. Data for the primary standards are taken from a
Cape Royal Observatory Mimeogram and are presented in table2.dat. It
gives the weighted mean V magnitudes and B-V colors based upon the
best series available up to the end of 1966. The table is believed to
provide a consistent UBV system over the southern sky. Most of the
secondary standard star data, given in table4.dat, were published in
Mon. Notes Astron. Soc. S. Afr. (22,23).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 90 918 Magnitude and colours of bright Southern stars
table4.dat 85 1118 Magnitude and colours of stars in Equatorial zone
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See also:
II/5A : UBV Photometry of Bright Stars (Johnson+ 1966)
Byte-by-byte Description of file: table2.dat table4.dat
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Bytes Format Units Label Explanations
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6- 11 I6 --- HD HD identifier of the star (Cat. III/135)
12 A1 --- m_HD [/] '/' indicates a blend with next HD number
13 A1 --- --- [(] to match the closing bracket
15- 20 F6.3 mag Vmag ? Magnitude in Johnson V filter
21 A1 --- u_Vmag [:)] doubtful value (:), variable value ())
23 A1 --- --- [(] to match the closing bracket
24- 29 F6.3 mag B-V ? Mean Johnson B-V colour index
30 A1 --- u_B-V [:)] doubtful value (:), variable value ())
32 A1 --- --- [(] to match the closing bracket
33- 37 F5.2 mag U-B ? Mean Johnson U-B colour index
38 A1 --- u_U-B [:)] doubtful value (:), variable value ())
43- 44 I2 mmag e_Vmag ? Dispersion on Vmag
46- 50 F5.2 --- w_Vmag ? Weight on Vmag
52- 53 I2 mmag e_B-V ? Dispersion on B-V
55- 59 F5.2 --- w_B-V ? Weight on B-V
61- 64 F4.2 --- w_U-B ? Weight on U-B (quarters assigned)
66 A1 --- S [CA*] Source of U-B value: C=Cape only,
A=Catalina station (Arizona),
*=discordant values.
68- 90 A23 --- Notes Remarks (variable star name, binarity)
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History:
* The tables were originally keypunched at Geneva Observatory in
December 1977.
* Checked and standardized in August 2010 (F. Ochsenbein, CDS)
(End) Francois Ochsenbein [CDS] 24-Aug-2010